South African Airways Technical (SAAT), a subsidiary company of the State-owned South African Airways (SAA) Group (and so, a sister company to the SAA airline), has reported that its has overhauled a shipset of landing gear for a Boeing 737-800 airliner in a record time. The term landing gear refers to the legs of the undercarriage, attached at one end to the aircraft fuselage and, at the other, to the wheel assemblies. Shipset indicates that the overhaul was carried out on all three landing gears (two main and one nose) of an aircraft. Aircraft landing gear is subject to serious forces on landing and must bear the weight of the aircraft when it is on the ground. It must be very strong and durable but is inevitably subject to wear-and-tear and can suffer corrosion and other damage.